. >> reporter: some of this information is from a "c" nbc report -- a cnn reporter and they saw two explosions initial lane 10 seconds later a producer said there appeared to be a third explosion possibly coming from a trash can across the street from where the first two explosions happened and obviously it was a chaotic scene on the ground. there are six to seven people injured and obviously there can be more than that. they have been taken to tents to treat fatigued runners and you have to know about two hours ago, the winers of the marathon crossed the marathon. the first runners in this very large race but there are many others still running in this race with about 45 minutes to go. certainly, it is a very chaotic scene on the ground right now as investigators and first responders try to get to those who are injured. this happened in the area of boilston street and i can tell you the area is packed with spectators even when the boston marathon is running as it is supposed to and there are many streets shut down on this street in boston. certainly it can be difficult to get to where they ne